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The human body is very sensitive to anything that it sees as a foreign body and deals with them very efficiently. One of the key applications of nanotechnologies is the ability mask these compounds from the immune system, often by encapsulating them in a benign carrier such as a liposome or vesicle in orderto deliver compounds to the site where they are needed without the immune system or the body’s other defense mechanisms neutralizing or altering the compound.

Inside the bloodstream with a Vesicle loaded with anti-cancer molecules. As captured from the Demo!

Inside the bloodstream in a NanoRobot!! Just like in real life, introduce a foreign metallic object into the blood and pretty quickly any passing anti-protein will get stuck to it, sooner or later it is completely immobile, engulfed by white blood cells and expelled from the body.